RetroVibratoWeb

A web version RetroVibrato that it in turn is based off of jsfxr.

This app generates arcade sounds from the 70s and 80s.

Rev 2

Projection creation

flutter create --platforms web .

Notes

Some of the json files have what appear to be invalid values, for example, JettsonSaucer.json has negative envelope Attack and Decay but the range is from 0->1.

I believe this was from the Mutate() and Random generators. It has code that could potentially generate negative values, for example:

Mutate is:
i.baseValues.attack += frnd(0.1) - 0.05

Random is:
o.baseValues.attack = cube(rndr(-1.0, 1.0))

One kind of fix would be to abs(add 0.5) to anything < 0.

The fix for Random would be to check what the range is and use that instead of hardcoded (-1,1)

Menus

• Generators
• Wave Forms
• Volume slider
• Save
  • sfxr
  • wave
• Load
  • sfxr
• Sample Rate
  • 44 KHz (default)
  • 22 KHz
  • 11 KHz
  • 5.5 KHz
• Sample Size
  • 16 bits
  • 8 bits (default)
• About

Tasks

• ☑ Settings sliders

• ☑ State management. Used Provider

• ☑ Load json and updating GUI

• ☑ Saving json and updating GUI

• ☑ Clicking a slider label resets it to Reset value

• ☑ Add Generator selector (top)

• ☑ Add Wave form selector (under top)

• ☑ Add volume slider (next)

• ☑ Add SampleSize

• ☑ Saving wave file via download

• ☑ Porting generator algorithm from Ranger-Go-IGE

• ☑ Implement play button

• ☑ Add Help popup

• ☑ Complete Auto play (optiona, on by default)

• ☒ Implement 22KHz, 11KHz,5.5KHz sample rate options

• ☒ Implement 16 bit sample size option

• ☒ Add exception handling (optional)

• ☑

• ☒

Audio

mime types:

• https://github.com/higuma/web-audio-recorder-js
• https://mimetype.io/audio/wav

https://pub.dev/packages/audiofileplayer audiofileplayer 2.0.1

Just Audio package

Just Audio package

https://stackoverflow.com/questions/67078045/flutter-just-audio-package-how-play-audio-from-bytes

Streaming audio in Flutter with Just Audio (unfortunately it is behind medium's paywal)

• Part 1
• Part 2

Notes

  ByteBuffer buffer = Uint8List(8).buffer;
  ByteData bdata = ByteData.view(buffer);
  bdata.setFloat32(0, 3.04);
  int huh = bdata.getInt32(0);

MasterVolume = 1